Sawmill set-works



(No Model.) 2 Sheets-Sheet 1. j

'0. P. COFFIN. SAWMILL SET WORKS.

No. 546,654. A Patented Sept. 24, 1895.

FIGJ- 35 8 "-Hm l Co 71270 Q ANDREW EGRAHAM. PHOTO-WHO.WASHINGTUN.D Cv

(No Model.) 2 Sheets-Sheet 2.

0. F. GOFFIN. SAWMILL SET WORKS.

No. 546,654; Patented Sept.- 24, 1895.

(Jilllw ANDREW E.GRANAM.PHOTO-UTNO.WASHINGION. D.C.

UNITED STATES PATENT OFFICE.

CHARLES F. GOFFIN, OF EAU CLAIRE, WISCONSIN;

SAWMILL SET-WORKS.

QPECIFIGATION forming part of Letters Patent No. 546,654, datedSeptember 24, 1895. Application filed December 24, 1894. Serial No,582,834- (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES F. COFFIN, a citizen of the United States,residing at Eau Claire, in the county of Eau Claire and State ofWisconsin, have invented a new and useful Sawmill Set-Works, of whichthe following is a specification.

The invention relates to improvements in sawmill set-works.

The object of the present invention is to improve the construction ofsawmill set-works and to provide simple and eifective means forpositively advancing the knees at each swing or throw of thesetting-lever.

A further object of the invention is to enable the swing or throw of thesetting-lever to be readily adjusted for setting the knees for variousthicknesses of lumber to be sawed, and to permit such lumber to bereadily sawed full or scant, as desired.

Another object of the invention is to enable such means of adjustment tobe readily arranged to suit different sizes of pinions of set-shafts, inorder that the improvements herein described may be readily applied toany suitable sawmill-carriage.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a plan View of sawmill set-worksconstructed in accordance with this invention. Fig. 2 is a sideelevation of the same. Figs. 3 and 4 are detail views of the adjustablestops of the arch or ratchet. Fig. 5 is a vertical sectional view online as w of Fig. 2. Figs. 6 to 9, inclusive, are detail viewsillustrating the construction of the eccentric rear stop.

Like numerals of reference indicate corresponding parts in all thefigures of the drawin s.

designates a set-shaft, journaled in bearings 2 and 3, forming asupporting-frame for the setting devices, and the set-shaft is designedto be provided with the usual pinions (not shown) for advancing andreceding the knees of a sawmill-carriage. As the improvementshereinafter described are applicable to any ordinary construction ofsawmill-car riage, the sawmill-carriage frame, the knees and theirconnections with the said shaft, together with springs or other devicesfor receding the knees, are not shown, as this construction is wellunderstood in the art. A friction-wheel 4 is keyed or otherwise fixed tothe set-shaft 1, and its periphery, which is smooth, is alternatelyengaged by inward-extending shoes 5 of a pair of oppositely-disposedclutch-levers 6, which are fulcrumed on the lowerends of dependingoscillating arms 7. The clutch-levers 6 are similarly curved and arelocated at oppositesides of the friction-wheel 4, and they are extendedin rear of the set-shaft 1, being interposed between the friction-wheeland the pair of oscillating arms 7. The lower ends of the clutch-leversare provided with outwardly-extending lugs or proj ections'8, which arerounded to form the pivots for the levers. pend from the set-shaft 1 andare provided with upward extensions 9,'and have bearing openings 10 forthe reception of the shaft 1.

The shoes 5, as illustrated in Fig.2 of the accompanying drawings,extend forward from the depending arms 7, and the upper terminals of theclutch-levers are connected by links 11 with upper and lower arms of arockshaft 12, journaled on the sides or bearings 2 and 3 and carrying ahead 13, having offset horizontally-disposed pivots 14 and 15, formingthe arms of the rock-shaft. The pivots 14 and 15 are secured in pairs ofupper and lower projecting cars 16 and 17, located at the terminals'ofthe transverse head 13. The links are provided at their forward endswith eyes or openings to receive the pivots 14 and 15, and their upperor rear ends are bifurcated and pivotally receive the upper terminals ofthe curved clutch-levers 6.

The rock-shaft is operated by a setting-lever 18, and when the same isswung to the right or forward the shoe of one of the clutch-leversfrictionally engages the periphery of the setwheel 4and causes the sameto turn to the left, and when the set-lever is thrown back the shoe ofthe other clutch-lever similarly engages the periphery of the set-wheeland causes the same to rotate to the 'left,whereby the set-shaft iscontinually rotated in a direction to advance theknees as the set-leveris oscillated back and forth.

When it is desired to recede the knees, the

The oscillatory arms 7 deshoes 5 are disengaged from the periphery ofthe set-wheel by eccentrics 19, pivotally mounted on the upper terminalsof the extensions 9 of the arms 7, and adapted to depress the upperportions of the clutch-levers to force the shoes 5 out of engagementwith the wheel 4, whereby the latter is free to rotate. This receding ofthe knees, when the set-wheel is free to rotate, is accomplished by anysuitable arrangement of springs or the like in the ordinary manner. Theeccentrics 19 are provided with handles 20 and are pivoted by bolts 21.

On the side or bearing 3 is mounted a ratchet or arch 22, having at itsinner face a curved groove 23, receiving an adjustable curved bar 24,which is clamped at any desired adjustment by screws 25, and whichreceive adjustable rectangular collars or stops 2G. The rectangularcollars 26 are provided at their inner sides with openings 27 to permitthem to be moved past the clamping screws or bolts, and they form stopsor teeth to be engaged by a spring-actuated lever 28 of an adjustableswinging stop 29 for limiting the forward swing or throw of theset-lever 18. The swinging adjustable stop 29 is provided at its lowerend with an opening for the reception of the rock-shaft, whereby it ishingedly mounted; and its upper end is bifurcated to form a guide forthe spring-actuated locking-lever 28. The locking-lever 28 has its lowerend pivoted between ears 30 of the stop 29; it extends upward from thelatter to form a handle, and it is held in engagement with the segmentalratchet by a spring 31, mounted in a socket of the adjustable stop 29.

The rearward movement of the set-lever 18 is limited by aneccentric-stop 32, provided with a handle 33 and adapted to increase ordiminish slightly the throw of the lever to enable lumber to be sawedeither full orscant, as is often necessary, as will be readilyunderstood. The eccentric-stop 32 is preferably mounted on a disk 34,which is centrally pivoted by a bolt at a recess of the segment. Asillustrated in Fig. 9 of the accompanying drawings, the upper portion ofthe disk 34, which projects slightly above the segment, is provided witha scale to indicate the extent of the increased or diminished throw ofthe set-lever, and the segment is provided with an indicator 35,cooperating with the scale of the disk. In the recess of the segment islocated a circular plate 36, having an annular flange fitting in acorresponding recess of the disk 3%, and the eccentric-stop is providedwith a spring-actuated pin or bolt 38 for engaging the circular plate 36to hold the stop against accidental turning. The pin or bolt 38 ismounted in a perforation of the eccentricstop at the inner face of thelatter, and is engaged by a spiral spring 39, which is held in theperforation by ascrew 40.

It will be seen that the set-works are simple and comparativelyinexpensive in construction and that they are positive and reliable inoperation, and that the set-shaft is continuously rotated'for advancingknees by each'swing or throw of the set-lever. It will also be seen thatthe clutch'levcrs may be readily disengaged from the friction-wheel topermit the knees to recede, and that the arch or ratchet may be readilyadjusted to accommodate the set-lever to different sizes of pinions, aslarge pinions require less movement than smaller ones. Furthermore, itwill be apparent that simple and effective means may be provided forslightly increasing or decreasing the swing or throw of the set-leverfor enabling lumber to be sawed either full or scant, if desired.

Changes in the form, proportion, and the minor details of constructionmay be resorted to without departing from the principle or sacrificingany of the advantages of this invention.

What I claim is- 1. The combination witha set shaft, of a friction wheelfixed to the shaft, a pair of arms mounted on the shaft and dependingtherefrom and located at opposite sides of the friction wheel, a pair ofclutch levers fulcrumed at their lower ends on the lower terminals ofthe depending arms and interposed between the same and the frictionwheel and extending above the shaft, the shoes located at the lower endsof the levers and being rigid therewith and extending inward therefromand arranged on the outer periphery of the friction Wheel, and mechanismconnected with the upper ends of the levers, whereby the shoes arecaused to engage the friction wheel alternately to produce a continuousforward rotation of the same, substantially as described.

2. In set-Works for saw-mills, the combination with a set shaft, of afriction wheel fixed to the shaft, a pair of depending oscillating armsmounted on the shaft and provided with upward extensions, the clutchlevers fulcrumed on the depending arms and provided with shoes forengaging the friction wheel, means for operating the levers, andeccentrics mounted on the extensions of the arms and arranged to engagethe clutch levers, whereby the shoes are held out of engagement with thewheel, substantially as described.

3. In set-works for saw mills, the combination of an arch or ratchet, aset lever, an adjustable stop for limiting the forward swing of the setlever, an eccentric stop arranged to limit the rearward swing of thesame and having a centrally pivoted disk provided with a scale, and anindicator mounted on the arch or ratchet adjacent to the scale,substantially as described.

4:. In set-works for saw mills, the combination with a set lever, of anarch or ratchet provided with a curved groove, a curved bar detachablyclamped in the groove and provided with adjustable teeth or stops, and aswinging stop for limiting the forward movement of the lever, saidswinging stop being provided with means for detachably engaging theteeth or stops of the curved bar, substantially as described.

5. In set-works for saw mills, the combination with a set lever, of anarch or ratchet provided with a curved groove, a curved bar arranged inthe groove, rectangular collars mounted on the curved bar and arrangedin the groove and provided at their inner sides with openings, screwsfor clamping the bar to the segment, whereby the collars are retained intheir adjustment, and a swinging stop provided with a device forengaging the collars, substantially as described.

6. An arch or ratchet designed for use in CHARLES F. COFFIN. Witnesses:

WM. BUSSELMAN, GERTRUDE BOSTWICK.

